WALLOPS ISLAND, Va. (AP) _ NASA has scheduled a weekend launch of a rocket from its Wallops Island Flight Facility in Virginia. NASA says the Terrier Improved Malemute suborbital sounding rocket will carry experiments developed by undergraduate students at Virginia Tech, the University of Colorado, Northwest Nazarene University, the University of Puerto Rico and the University of Nebraska. The launch is scheduled for Saturday between 6:30 a.m. and 10 a.m. NASA had planned to launch the rocket in March but postponed the launch because of weather.